Sound reproducer



Feb. 13, 1923. I 1,445,322.

I J. mmzs.

SQUND REPRQDUCER.

FILED MAY 1. i920.

- a'M UMM Patented Feb. l3 l9?! i i li lliyide I JACOB Jones on SEATTLE, WASHINGTON.

SOUND REPRODUCER.

Application filed "May 1, 1820. Serial No. 378,214.

To all whom it may conce n Be it known that l, J;

zen of the United States,

icon Jones, a citiresiding at Seattle,

in the county of King and State of ash 5 ington, have invented certain new and useful Improvements in Sound Reproducers, oi which the following is a specification reference being had to the accompanying. drawings.

This invention relates to sound reproduo ers, and particularly to a'sound reproducer for use in connection with phonographs.

An object of the invention is toprovidea reproducer which reproducer sounds in a clear tone and at the same time eliminates scratching and otherhars h sounds caused by the engagement of the stylus with therecord.

\Another object is to pr of this character which ovide a reproducer reproduces a true tone without harsh sounds at all times regardless of the speed of the machine,

Still another ObJGCi is to provide a reproducer of this character including a diaphragm which receives the sound from a member that is enoage'd cured to thediaphragm.

with but not se- A further object is to provide a reproducer includim a diaphragm which is disposed between pneumatic gaskets which serve to absorb false sounds.

A still further object is to provide a reproducer or" this character including a stylus carrying aim, one end of which is provided.

with a sound transmitting member, the portion of the stylus carryin sound transmitting mem and resilient to serve the sound transmittin diaphragm.

arm adjacent the her being reduced as a spring in forcing g member against the With these and other objects in view the invention consists in the improved construction and arrangement oi after more claimed and illustrated in d 'awings, in which parts to be hereinparticularly describerh fully the accompanying Figure 1 is a vertical elevation, of a sound reproducer constructed in accordance with an embodiment of the inv Figure 2 is a transveshowing the pneumatic entionj rse sectional view gaskets and the sound transmitting member;

Figure 3 1s a fragmentary and sectional view of one of the pneumatic gaslretsand its air inlet member.

Referring to the draw reproducer sound box ha ngs, 5 designates a ving a pair of annular grooveso in the inner peripheral flange '7. A diaphragm 8 is mounted in the sound box' between the groove 6 and it is held in position by means of pneumatic gaskets 9. Each of the gaskets 9 is tubular in formation. and is provided with an inlet member 10 in which a spring pressed valve 11 is disposed, a cap 12 being provided to close the outlet' By this means a suitable pump maybe attached to the inlet to inflate the gaskets the inflation of the gaskets causing the same to firmly engage the diaphragm on both sides thereotand securely hold thesaine in posi tion without causing the diaphragm to be penetrated by any fastening means or en gaged by metal parts so that false or scratching sounds transmitted to the diaphragm are absorbed by the pneumatic gaskets.

The sound box 5 is provided with cars 13 between which trunnions 14 of a stylus carrying arm 15 are mounted. These trun nions are engaged by the usual screws 16 so that they may be adjusted to the tension desired. The stylus carrying arm 15 is provided on one end with the usual stylus receiv ing socket 1'? and has its other end portitm 18 reduced and curved outwardly as'at l9 and then extended inwardly and upwardly, the extremity 20 extending in alignment with the main portion ot the arm.

.By extending the portion 1!) outwardly and reducing the same, a spring action is aiiorded, the purpose oi which will be hercinai'ter described.

In order to transmit the sound received by the stylus arm to the diaphragm without causing the diaphragm to engage any metal part. or to cause the formation of openii s in the diaphragm. a sound transmit .ng member 21 is provided. This member is preferably constructed from cork. is circular in torimition and has extending from the central portion of its side 22 a socket member 2?) having abore 24- adapted to receive the end 20 oi" the stylus carrying arm, a set screw 24- being threaded into the socket for engagen'ient with the end 20 to prevent disengagement of the sound transmitting member from the stylus carrying arm. The side 25 of the sound transmitting member 21 is concave so as to permit the marginal edges 26 to engage the diaphragm, 110

surface of its and at the same time the concavity of the side 25 provides a chamber through which the sound may pass on to the diaphragm in addition to being transn'iitted by the end 28 soldered or otherwise secured to the sound box adjacent or'between the cars 13. The end 29 of the spring is extended outwardly between the ears, over one of the trunnions ll into engagement with the stylus carrying arm I-S-ahovethe pivot oi the stylus arm. This spring is of the compression type so that it constantly forces the stylus carrying arm 15 toward the diaphragm and thus causes the sound trans mitti-ngmember 21 to engage-the diaphragm at all' time's.

lit is a well known fact that metal used in the construction of amplifiers and sound reproducers is largely responsible *for the harsh and grating sounds tra-nsmittedto the stylus. .At the same time, hoWeverQme-tal is necessary in order to render the device substantial. Vith the sound transmitting member: 2-1, strength is provided at the same time all metal connections are eliminated. This is possible by providinga concavity in one surface of the soun d transmitting ,memher so as to not only prevent the escape oi s0und,but also to permit the sound to be transmitted by, the marginal edges of said surface to the diaphragm, but in order to transmit sounds to the diaphragm the sound transmittor must be firmly engaged with the diaphragm. V This is accomplished by means of the resilient reduced end portion vibrations transmitted thereto,

In this Way, the sound transmitting member coacts with the diaphragm regardless of the flexing of the diaphragm by the sound In addition to this, the marginal edges of the diaphragm are not secured by any metal means, but are disposed between pneumatic gaskets ,Which serve to absorbany harsh sounds that might be transmitted by the member 21. By this novel arrangement only the true tone or sound istransmitted tothe diaphragm; sotliat the natural sound oi? the voice i'sre eroduced Without harsh or false sounds.

The invention having been set forth, What is claimed as new and useful is Sound transmitting "means fora sound reproducer embodying a I diaphragm, a

mounting-therefor, a stylus carrier pivoted at its lOWEl' end portion to the i'nounting, a spring carried by and extending upwardly from beneath the mounting and engaged with the central portion of the stylus carrier for urging the upper end portion of said stylusficarrier toward the diaphragm a soundtransmitting member, a socket member threaded in the outer face of said sound transmitting member and arranged to receive the upper end portion of the stylus carrier. 1 p I a In testimony whereof I hereunto aliix my signature. a

moo s JONES. 

